Lev 8 is not talking about a marriage or marriage supper.
The context of Lev 8 is the consecration of the temple and priests.
Lev 8:1 And the LORD spoke to Moses, saying:
Lev 8:2 Take Aaron and his sons with him, and the garments, the anointing oil, a bull as the sin offering, two rams, and a basket of unleavened bread;
Lev 8:3 and gather all the congregation together at the door of the tabernacle of meeting.
.....
Lev 8:33 And you shall not go outside the door of the tabernacle of meeting for seven days, until the days of your consecration are ended. For seven days he shall consecrate you.
Lev 8:34 As he has done this day, so the LORD has commanded to do, to make atonement for you.
Lev 8:35 Therefore you shall stay at the door of the tabernacle of meeting day and night for seven days, and keep the charge of the LORD, so that you may not die; for so I have been commanded.
it is exactly foreshadowing the consecration banquet of the adopted sons of God, hid behind the shut doors of the temple in heaven, after they don their beautiful garments [New Man bodies],
made for beauty and for Glory.
You see, God ordained that it is only in the Living Oracles where we can be taught from, to learn the doctrine of our goal of being brought "to Christ". "Salvation is of the Jews", and only in the Living Oracles can we learn the details of our Salvation planned for us from the foundation of the world, and of our adoption and adoption bodies, when we are then called the perfected sons of God, and are consecrated for the priesthood in His name, in His heavenly temple, for a whole week shut in with Him, celebrating.
Hbr 5:12
For when for the time ye ought to be teachers,
ye have need that one teach you again which [be]
the first principles/ABC'S of the oracles of God; and are become such as have need of milk, and not of strong meat.
Moses was shown the heavenly things to pattern as a type and shadow on earth, so as to teach about the Person and work of Christ, to bring us to "perfection" =to the immortal bodies of the adopted and regenerated sons of God, in His New Man name.
The High Priest in Israel served in the office of Yeshua Ha mashiach, and every garment he wore spoke of Christ's New Man creation body, and every deed he did spoke of Christ's Office to come, of high Priest and the Father =the Firstborn, of all His adopted sons, who would be priests in His heavenly temple, in His New Man name, wearing the garments of Salvation =the New Man bodies.
When the sons of the high priest donned their beautiful garments made for beauty and for Glory, according to the pattern shown Moses on the Mount which spoke of the heavenly things in types, then they were anointed for service, so as to stand before the LORD in His temple, and celebrated in His temple, shut in, for a full week of seven days -hidden.
This is all types and shadows of the regeneration of our bodies and of our celebrating with Him in His temple in heaven, for seven days -a full week [of years], shut in, behind the shut doors, hidden.
Exd 25:9 According to all that I shew thee, [after] the pattern of the tabernacle, and the pattern of all the instruments thereof, even so shall ye make [it].
Hbr 8:4 For if he were on earth, he should not be a priest, seeing that there are priests that offer gifts according to the law:
Hbr 8:5 Who serve unto the example and shadow of heavenly things, as Moses was admonished of God when he was about to make the tabernacle: for, See, saith he, [that] thou make all things according to the pattern shewed to thee in the mount.
Exd 28:2 And thou shalt make holy garments for Aaron thy brother for glory and for beauty.
Exd 28:3 And thou shalt speak unto all [that are] wise hearted, whom I have filled with the spirit of wisdom, that they may make Aaron's garments to consecrate him, that he may minister unto me in the priest's office.
Exd 28:40
And for Aaron's sons thou shalt make coats, and thou shalt make for them girdles, and bonnets shalt thou make for them, for glory and for beauty.
Exd 28:41 And thou shalt put them upon Aaron thy brother, and his sons with him; and shalt anoint/משח
mashach them, and consecrate them, and sanctify/קדש
qadash them, that they may minister unto me in the priest's office.
Lev 8:31 ¶ And Moses said unto Aaron and to his sons, Boil the flesh [at] the door of the tabernacle of the congregation: and there eat it with the bread that [is] in the basket of consecrations, as I commanded, saying, Aaron and his sons shall eat it.
Lev 8:33 And ye shall not go out of the door of the tabernacle of the congregation [in] seven days, until the days of your consecration be at an end: for seven days shall he consecrate you.